I have Kubernets 1.15.3 cluster with Calico CIN and IPVS setup. Cluster running two coredns prods(one in master node and one in worker node). From one of the nginx pod, I can ping coredns pod IP running on worker node, but unable to ping coredns pod running on the master node.

Here is my cluster subnet configuration.

 kubernetesVersion: v1.15.3
    networking:
      dnsDomain: cluster.local
      podSubnet: 10.232.0.0/16
      serviceSubnet: 10.232.0.0/12

Calico IP Pool

 # The default IPv4 pool to create on startup if none exists. Pod IPs will be
            # chosen from this range. Changing this value after installation will have
            # no effect. This should fall within `--cluster-cidr`.
            - name: CALICO_IPV4POOL_CIDR
              value: "10.232.0.0/16"

From the master node I can see IPVS entry for coredns pod IP, but unsure why ngnix pod not able ping this IP address. Any tips to troubleshoot this issue.

ipvsadm -ln |grep 10.232.35.74             
  -> 10.232.35.74:53              Masq    1      0          0  
  -> 10.232.35.74:9153            Masq    1      0          0  
  -> 10.232.35.74:53              Masq    1      0          0  

Thanks SR